Warp-regulating mechanism for weaving-looms.



- R. FARNWORTH & JACKSON. WARP RBGULATING MECHANISM FOR WEAVING ooms.

APPLICATION FILED SEPT. 28,1912.

Patented Nov. 10, 1914.

UNITED STA'IES PATENT onnron;

ROBERT FARNWORTH AND THOMAS TROUGHTON JACKSON, OF BOLTON, ENGLAND.

WARP-REGULATING MECHANISM FOR WEAVING-LOOMS.

Application filed September 28, 1912.

To all whom it may concern:

Be it known that we, Ronna'r FARNWORTl-I and THOMAS Tuouorrrox JAcKsoN, subjects of the King of Great Britain and Ireland, and residents of Bolton, in the county of Lancaster, England, cotton manufacturer and engineer, respectively, have invented certain new and useful Improvements in Warp-Regulating Mechanism for \Veaving- Looms, of which the following is a speci cation.

Our invention relates to improvements in warp-regulating mechanism for weaving looms, the object being to provide means for giving a positive regulation of the warp beam so as to let oil" a given supply of the yarn and at the same time to hold all the ends tight, and while it is particularly adapted for small ware looms of the Poyser type it is nevertheless applicable to looms for weaving wider fabrics.

Our invention consists essentially in the employment of a rising and falling ratchet pawl in conjunction with the pivoted vibrator device used in the looms referred to and also in conjunction with the beam, containing a warp, a further feature of our invention being the provision of a pressure roller in connection with the wrap beam made of cork or sheathed with cork or similar resilient material.

Our invention will be fully described with reference to the accompanying drawings in which- Figure 1 is a side elevation of so much of a Poyser tape loom as is necessary to illustrate the application of our invention, while Fig. 2 is an end elevation of same from the rear, partly in section.

In the aforesaid drawing a indicates the main forward framework of the loom, b the shuttle race, 0 the shuttle, d the guide comprising the dovetail block which fits in corresponding dove tail grooves, e the main driving shaft, while the broken lines indicate the warp, the shed of which is indicated as being open. All the parts referred to are of ordinary or usual construction. In

looms aforesaid a vibrating frame 9 is employed arranged transversely of the warp f and pivoted at h to the rear frame 71 of the loom in a position suitable and convenient, the upper portion carrying a rod or roller 7' over which the warp 7 passes while its lower portion is controlled by a spring is, or springs, usually one spring, which is adapt- Specification of Letters Patent.

Patented Nov. 10, 1914.

Serial No. 722,964.

ed to act in opposition to the tension of the warp as the latter passes over the rod or roller j from the warp beam (which is not indicated) to the heddles. The spring has its rearward end coupled to the center of the lower arm of the frame I/ while its forward end is, in turn, connected to a hooked rod m passing through the frame a threaded at its forward end and adjusted longitudinally by a milled nut n or the like so that the tension on the warp can be adjusted as required. In connection with the vibrator frame g 18 a projecting arm 0 coupled to a slotted link p by the pin 0 which is adapted to be secured to the link at any predetermined point, pivotally depending from a rod 51 running alongside the loom frame, the forward end of this rod being connected to a pin 7' carried by a pivoted lever s, the lower arm of said lever being provided with a bowl' t engaging with a cam groove it formed in a cam "u fixed 0;, the usual cum or driving shaft 0. The rearward end of the rod q has connected to it a pivoted pawl 10, the pivot pin a) of which passes through the slot of an arm y pivoted on the shaft or beam 2 carrying or controlling the passage of the warp f over the vibrator g to the heddles.

One of the important features of our invention is to give the pawl w a rising and falling motion in accordance with the position of the vibrator g which latter, in turn, is regulated by the am unt of arn let off from the beam by the pawl engaging with a ratchet wheel 2 on the end of the beam shaft 2. When the vibrator g is in the normal position, as indicated by the full lines in the drawing, the ratchet pawl is. in gear with the ratchet wheel and should the yarn or warp f from any cause become tighter the upper end of the vibrator carrying the rod or roller 9' is pulled nearer to the heddles thus causing the arm 0 forming part of it to move the pawl rod q and give the pawl a longer stroke so as to let off more yarn from the beam. Similarly if the warp am hecomes slacker than normal, the vihrator g is pulled by the spring or springs is backward and the ratchet pawl is then lifted clear of the teeth of the ratchet wheel, as indicated by broken lines and remains in such position until the normal working position is again reached. In this connection it should be understood that the projecting arm 0 is rigidly connected to the i been previously employed and is not affected ably mounted'on the roller.

slotted link p, the slot in which is only for the purpose of enabling the parts to be adjusted and set with relation to each other. The ratchet pawl is so pivoted on its pin that it cannot fall beyond a certain point, that is to say, as to its ratchet end, so that it'can always come into gear again at the.

proper position on the ratchet wheel. This is simply efiected by providing it with a projection 3 to engage withthe rear face of the slotted arm connected with the pawl.

The various levers and links can be arranged in any convenient form and the ratchet pawl may be made to push or pull so long as the objects referred to are accomplished. I

A further feature of our invention in connection with the warp beam or shaft 2 is to provide a' pressure roller 4; of cork or similar resilient material, the cork being suit- The'cork is considerably cheaper than rubber which'has by oil though it possesses the requisite amount of resiliency for the purpose. The positive roller 2, used in conjunction with the cork roller for the warp to pass between them when such roller e is not useddirectly as a warp beam, is made of iron-in'the usual way and it is this roller which carries the ratchet wheel previously referred to. 4 The cork roller or cork-covered roller is posii tively pressed against the warp passing between it and the roller 2 by mounting it in a frame 5 provided with pivots 6 adapted to hook under bearings 7 a screw or screws 8 being carried at the rear end of the frame 1? which may be adjusted against the framework of the loom so as to exert the required pressure and yet enable the roller frame to be easily removed when required for passing the warp below it. Suitably-arranged guide rollers 9, or rods, are provided to guide the warp in the proper direction.

From the foregoing description it will be readily understood that the tension on the warp is automatically regulated.

\Vhat we claim as our invention and desire to secure by Letters Patent is '1. In a warp regulating mechanism, a main frame, a vibratory" frame supp ar'ted by the main frame, feed rollers disposed adjacent the vibratory frame, a horizontally disposed rod, a'pawl carried by one end of the rod, means carried by the feed rollers for cooperating with the pawl whereby movement of the rod will rotate the feed rollers, means for reciprocating the rod, and connecting means between the rod and vibratory frame whereby movement of said vibratory frame will control the movement of the rod and the engagement of the pawl with the cooperating part on one of the:

on one end thereof adaptedto mesh with the teeth of the ratchet, means disposed adjacent one end of the rod for operating the rod for causing the pawl to engage the teeth and move the same,an-d connecting means between the rod and'the vibratory frame, whereby movement of the said frame will control" the engagement of thejpawl with the ratchet. Y

frame, one of the rollers having a ratchet wheel, a horizontally disposed rod having 3. In a warp regulating mechanism, a '80 main frame, warp feeding rollers" on 'the a pawl on one end thereof, means for mov ing said rod connected thereto at its opposite end, a vibrator 'over'which the warp" passes, connecting means between theqvibrae' tor and rod, whereby movement-of the vibrator willcontrol the movement ofv 'the rod and the engagement of thepawl-with the ratchet wheel. i 1

4. In a warp regulating mechanisxnya main frame, warpfeeding rollers on the frame, one of the rollers having ratchet wheel, a vibrator over which the" wa passes, said'vibrator having a laterally extending arm, a horizontally disposed rod,-

said rod having a depending-link, means for forming a connection between the' linlr and the arm, a pawl on one end of the rod; said pawl adapted to cooperate with the ratchet wheel, whereby movement of the vibrator controls. themo' ement'of the rod and the engagement of the pawl with the -,1

ratchet.

In testimony whereof we' have hereunt'o set our hands in the presence of two" wit-" nesses. I

ROBERT riauwcnrtt 3 i THOMAS TROUGHTON JAOKSON Witnesses: I

AMY Evnmm: E'vms v WILLIAM HENRY TAYLQR. 

